Alan Modra <amo...@gmail.com> writes: > On Wed, Mar 10, 2021 at 01:44:57PM +0100, Christophe Leroy wrote: >> >> Le 10/03/2021 à 13:25, Alan Modra a écrit : >> > On Wed, Mar 10, 2021 at 08:33:37PM +1100, Alexey Kardashevskiy wrote: >> > > One more question - the older version had a construct "DEFINED (.TOC.) ? >> > > .TOC. : ..." in case .TOC. is not defined (too old ld? too old gcc?) but >> > > the >> > > newer patch seems assuming it is always defined, when was it added? I >> > > have >> > > the same check in SLOF, for example, do I still need it? >> > >> > .TOC. symbol support was first added 2012-11-06, so you need >> > binutils-2.24 or later to use .TOC. as a symbol. >> > >> >> As of today, minimum requirement to build kernel is binutils 2.23, see >> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.kernel.org_doc_html_latest_process_changes.html-23current-2Dminimal-2Drequirements&d=DwIDAw&c=jf_iaSHvJObTbx-siA1ZOg&r=uzpscot8Q8p-51o1Gp1vnzKV94bfny2qmUdVe821lv0&m=SYi605mn0I1hf1QoHuvHXtS_Z-R6JJHbzS34cEtV2Tk&s=47ckf3yxVcP6RwRb8D9viYOQSWpf6rXrnWj4YM4OTJ0&e= >> > > Yes, and arch/powerpc/Makefile complains about 2.24. So for powerpc > that means you need to go to at least 2.25.
Not quite. It only complains for little endian builds, and only if you have stock 2.24, it will allow a 2.24.<something>. I do most of my builds with 2.34, so I have no issue with newer binutils. But we try not to increase the minimum version too rapidly to accommodate folks using older and/or "Enterprise" distros that are stuck on old toolchains. I think we are within our rights to increase the minimum requirement for powerpc builds, if it brings advantages we can identify. The way to do that would be to add a new check in our arch Makefile that rejects the older versions. cheers
